of boston



(No Model.)

M. RUSSELL.

PUMP.

No. 336,263. I Patented Feb. 16, 1886.

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- INvENTuR NEEEEEI UNITED STATES PATENT OFFICE.

MANUEL RUSSELL, OF BOSTON, ASSIGNOR OF ONE-HALF TO EDWARD H. PALMER, OFREADING, FRANKLIN H. COLLINS, OF REVERE, AND CHARLES W. COLESWORTHY, OFBOSTON, MASSACHUSETTS.

PUMP.

SPECIFICATION forming part of Letters Patent No. 336,263, dated February16, 1886.

Application filed August 17, 1885. Serial No. 174.571. (No model.)

To all whom it may concern:

Be it known that I, MANUEL RUssELL, of Boston, in the county of Suffolkand State of Massachusetts, a citizen of the United States,

have invented a new and useful Improvement in Pumps, of which thefollowing isafull,clear, and exact description, reference being bad tothe accompanying drawings, forming a part of this specification, inexplaining its nature.

The object of the invention is to provide a pump with very great power,and in the drawings I have illustrated the invention as applied to adouble-acting pump; but I would here state that I do not confine myselfto such use, as it may be used equally well on a pump with a singlecylinder and piston.

Referring to the drawings, Figure 1 represents, part in front elevationand part in vertical section, a pump provided with my invention. Fig.2is aplan view thereof. Fig. 3 is a vertical section on the line x :v ofFig. 2.

Referring to the drawings, A is one cylinder of the pump, and A theother. Each cylinder has a piston, b, of ordinary construction, one

only of which is shown. These pistons are connected by the piston-rod 0,supported in suitable bearings. The reciprocating movement of the pistonis obtained by means of a worm or screw, 0, formed on the piston-rod O,

0 and the worm gear-wheel I), which is mounted upon the piston-rod,andhas the interior Wormthread, d, to engage with the worm c. Thisworm-wheel D is held in place between the two bearings E E, throughwhich the piston-rod passes; and the worm-gear also has the exteriorworm-teeth, d, adapted to engage with the worm F, upon the shaft F. Thisshaft has bearings at ff.

I would state that in lieu of the worm-wheel D an ordinary spur-gear orbevel-gear may be employed, provided that it has the interior worm-teethto engage with the worm 0 on the piston-rod.

It will be seen that upon the revolution of the worm-wheel D thepistonsare moved in one direction or the other, according as the wheel isrevolved; and it will further be seen that it is necessary at the end ofthe movement of the pistons in one direction that the revolution of theworm-wheel D be reversed; and in order to accomplish this I haverepresented the shaft F as having the pulleys G G G G upon whichare'mounted the belts H H, and which move in opposite directions. Twoofthese pulleysnamely, the pulleys G G' -are loose, and twonamely,GG"are fixed to the shaft, and the pulleys are so arrranged that theyare allernately moved by the belt-shifter from a fixed to aloose pulley,or the reverse; and this movement ofthe belts is provided by thebelt-shifter M, having the belt-engaging arms m mounted in the supportsm, and moved in one direction at the end of the movement of the pistonin one direction by the lever N, pivoted at n, and secured at n to thearm n of the belt-shifter, and having its end a arranged to straddle thepiston-rod, so that upon contact ofa projection thereon with it thebelt-shifter is moved. The device for moving the belt-shifter in theopposite direction upon the end ofthe reverse movement of the piston-rodis of a similar character and'comprises the lever N, pivoted at n andconnected at n with the arm n of the beltshifter, its end n beingarranged in proximity to the piston-rod,and moved by any project-ionthereon that may be brought in contact with it.

In operation, at the end of the movement in one direction the revolutionof the shaft F,and consequently of the gear-wheel D, is reversed byshifting the belt, and upon the end of the movement of the piston in theother direction the revolution of theshaft F is again reversed, and thepiston-rod and piston caused to travel back.

It will be seen that by this construction very great power is developedupon the pistons, and by the exercise of comparatively little power uponthe shaft F.

Of course I do not confine myself to the especial form of reversing gearherein de- 0 scribed, but may use any of the well-known reversing-gearsof the market as an equivalent; neither do I confine myself to the useof the invention in connection with two pistons and cylinders, as it maybe used with one as well.

I would state that the device may be used with the cylindersofany oftheordinarypumps of the market, and as this is the caseIhave not describedthe interior construction of the pump or of the valve mechanism.

Having thus fully described .my invention, I claim and desire to secureby Letters Patent of the United States 1. The combination, in a pump, ofthe cylinders A A, a piston, I), in each cylinder. connected With eachother by the piston-rod O, the said piston rod having a Worm, 0, formedthereon, a worm -wheel having an interior thread adapted to engage theworm or screw of the piston-rod, the hearings E E, for revolving theworm-wheel, and a reversing device for automatically reversing themovement of the mechanism operating the worm-wheel at the end of eachmovement of the piston-rod all substantially as described.

MANUEL RUSSELL.

In presence of v F. F. RAYMOND, 2d, FRED. B. DOLAN.

